Synopsis

Input Parameters

pc

- the preconditioner context

fill

- amount of expected fill

Options Database Key

-pc_factor_fill <fill> -Sets fill amount

Note

For sparse matrix factorizations it is difficult to predict how much
fill to expect. By running with the option -info PETSc will print the
actual amount of fill used; allowing you to set the value accurately for
future runs. Default PETSc uses a value of 5.0

This parameter has NOTHING to do with the levels-of-fill of ILU(). That is set with PCFactorSetLevels() or -pc_factor_levels.